This is a bunch of achievements that I have gotten in the past week on Forza 3:

Bottomed Out - Jump five feet (5G)Welcome to Forza Motorsport - Complete the very first race in the game (15G)Interior - Win a race using cockpit view (5G)Car Level 1 - Achieve Car Level 1 in Season Play mode (5G)Driver Level 1 - Level 1 in Season Play (10G)Weekday Event - Complete your first weekday event in Season Play mode (10G)Car Level 2 - Achieve Car Level 2 in Season Play mode (5G)Driver Level 2 - Level 2 in Season Play (10G)Driver Level 3 - Level 3 in Season Play (10G)Weekend - Complete your first weekend race in Season Play mode (10G)Demon - Travel in excess of 200 mph (5G)Shutterbug - Take a photo of your car (10G)Curator - Upload a photo or movie to Forzamotorsport.net (10G)Drifter - Earn over 1,000 points in a single drift section (5G)Director - Complete your first Forza Motorsport movie (10G)Painter - Create a paint job or vinyl group (10G)Driver Level 4 - Level 4 in Season Play (10G)Driver Level 5 - Level 5 in Season Play (10G)Car Level 3 - Achieve Car Level 3 in Season Play mode (5G)Year 1 - Complete the first year of Season Play (50G)Driver Level 6 - Level 6 in Season Play (10G)Driver Level 7 - Level 7 in Season Play (10G)Car Level 4 - Achieve Car Level 4 in Season Play mode (5G)Driver Level 8 - Level 8 in Season Play (10G)